Are you not located in the United States and have basic/local TV stations? Its broadcast nationally on NBC. If not you can listen to it on DVE.com...and i'm sure if you go to justin.tv tonight there will be quite a few people showing it there.

you will probably have to create a username and friend the broadcaster (Pittsburghsportsonline) because the last preseason game he made password protected in order to improve the streaming quality. But he will make the password available to everyone on his friends list for each game. hope this works for you!